203112101011 has 2 divisors, whose sum is σ = 203112101012. Its totient is φ = 203112101010.

The previous prime is 203112101009. The next prime is 203112101021. The reversal of 203112101011 is 110101211302.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 203112101011 - 2¹ = 203112101009 is a prime.

Together with 203112101009, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 203112100982 and 203112101000.

It is not a weakly prime, because it can be changed into another prime (203112101021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101556050505 + 101556050506.

It is an arithmetic number, because the mean of its divisors is an integer number (101556050506).

Almost surely, 2^203112101011 is an apocalyptic number.

203112101011 is a deficient number, since it is larger than the sum of its proper divisors (1).

203112101011 is an equidigital number, since it uses as much as digits as its factorization.

203112101011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 203112101011 its reverse (110101211302), we get a palindrome (313213312313).

The spelling of 203112101011 in words is "two hundred three billion, one hundred twelve million, one hundred one thousand, eleven".